Steve Hoskins : Look for the old thread " trompe- 16th-century tech may revolutionize mine drainage experiment " I gave it a 'Bump " interesting comments,
because this is "DRY " air it can be used to turn an insulated box into a 'Root Cellar '.

By planning to bury your compressed air Tank/chest in the ground you also gain increased 'head' as you dig down !

This is certainly not the easiest way to aerate running water, but aerating (and cooling) water is always a practical goal ! Big AL